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Micro grain and Ultrafine WC Grade Application

  • Micro grain and Ultrafine WC: Micro grain WC refers to the size range of 0.8 to 1.0 micron WC (Tungsten Carbide). Ultrafine WC refers to 0.4 to 0.6 micron WC. Use of Ultrafine WC allows for high hardness at higher Cobalt (binder) contents, which results in higher fracture toughness. Micro grain is a standard, general use material which is more common for drilling and milling.

  • TMK-320: TechMet’s 10% Cobalt, Micro grain WC grade for general purpose, commonly used for drilling and milling grey cast iron, stainless steel and heat resistant alloys.

  • TMK-3028: TechMet’s 8% Cobalt, Ultrafine WC grade. This grade has high hardness and wear resistance. It is suitable for machining higher hardness materials. It can be used to extend tool life over TMK-320 in some applications. Used extensively for micro drills, circuit board drills and abrasive applications.

  • TMK-3012: TechMet’s 12% Cobalt, Ultrafine WC grade. High hardness, high strength and good wear resistance grade used for precision aerospace applications. This is usually used for larger diameter milling applications. Suitable for heat treated steels and aluminum alloys.

  • Tools made from the above grades are usually CVD (chemical vapor deposition) coated, or PVD (physical vapor deposition) coated for extended tool life. The coating composition will vary depending upon the material and method of machining being done.

  • TechMet offers other Ultrafine and Micro grain grades designed for wear and shock resistant applications.